Device for fusing glass extensions onto glass vessels



May 11 ,1926.

E; SCHOTT ET AL DEVI'CE FOR FUSIG GLASS EXTENSIONS ONTO (ILASS VESSELS Patented May 11, 1926.

UNITED STATES PATENT OFFICE.

ERICH'. SCHOTT,l ARTHUR HASENSTEIN, AND KARL DITSCHER, 0F JENA, GERMANY,

ASSIGNORS TO FIRM 0F -J'ENAER MANY.

GLASWERK SCHOTT AND GEN, QF JENA, GER- DEVICE FOR FUSING GLASS EXTENSIONS ONTO GLASS VESSELS.

Application led October 22, 1925. Serial No. 64,195.'

The fusing of glass extensions onto glass vessels (e. g. of the exciting tubes onto lass rectifier-vessels) has hitherto been done gy hand. Thereby it was necessary to continually rotate during the working process the glass bodies to be provided with the extensions in order to prevent the glass softened at the fusing place from flowing oil towards one side and in order that the thickness of the wall of the extension became uniform over the whole extent of the fusing lace. However, it was diiiicult to handle t e glass bodies in a heated state, particularly if the axis upon which the rotations were to be based did not coincide with the lon itudnal axis, and even with skilled wor men the production of an uninterrupted number of faultless work pieces was an exception. According to the invention it is generally possible to exclude the production of faulty and therefore useless work pieces by using a device in Awhich the glass odies to be providedwith extensions rotate about an axis deviating from their longitudinal axis, whereby they are held by gripping device, participating in the rotary mof tion and admitt-in of displacing the glass bodies about an axis intersecting the axis of rotation. If the extensions, as is the case in the example, way that their lon 'tudinal axis obliquely intersects the glass ody, ,the device is suitably used in such a manner that the extensions are rst perpendicularly fused on and subsequently set obliquely with continuous heating of the fusing place during the uninterrupted rotation of the whole work piece about the longitudinal axis of the extensions by displacing them about an axis,lintersect ing the axis of rotation of the glass bodies and traversing the fusing place.

Frequently it is of importance to adhere very exactly to the angle at which the extensions are to be fused onto the glass bodies. A simple means for securing the glass bodies during the respective partof the working process in the position embracingthe prescribed an'gle with its longitudinal axisconsists in this that the displaceable part of the gripping device is secured in the posiare to be fused on in such a tions, requisite for the dilferent working processes, by a locking mechanism. The atter may be of a different kind according to the requirements of the particular case. For instance, if some denite angles often recur for the axial position of the extensions it is suitable to choose a ratchet, the tooth gaps of which correspond to the angular positions coming in question. On the other hand, friction or friction-ratchet gears 'are to be used if it be desired to adjust the angles as required in each particular case.

The position of the glass bodies during the rotation having thus been fixed, it is advisable to also guide positively the extensions to be fused enduring the working process. Thereby itis possible to use to advantage an arrangement with which also the extension to be fused on at any one time 1s held in a gripping device, viz, in such a way as to rotate about its longitudinal axis lying in the axis of rotation of the glass body, while one of the two gripping devices is displaceable in the direction of the axis of rotation. It will generally be preferable to dispose the gripping device, holding the extension, displaceable, but the grippin device, carrying the glass body, rigidly lfixa le. Thereby it must only be seen to that both partial work pieces from the moment of the fusing until the hardening of the fus- (ing place rotate at exactly the saine angular speed. This .takes to be fused on rotate in the same direction at the same angular'speed.

The accompanying drawing shows an example of the invention. Fig. 1 is a longitn dinal section o f the' device in an elevation, Fig. 2 a section on the line 2--2 of Fig. 1 in a side view,-Fi 3a partial section on the line 3-3 of Fig. 1 ina plan.

Onto a base-plate a is cast a bearing a1 in which rests a neck journal b. The latter carries a circular-arched carriage guide c in which a carriage is guided in such a way as to be able to carry out circular motions about the centre of curvature e of the carriage guide c, lying in the extension of the axis of the journal The carriage d is reinforced by means of cross slides (Z1 and provided at its upper end with an arm d2 in which a guide bush f1 is screwed; a tube g, which is displaceable in this bush f1 and provided with a conical hood g1, is under the action of a spring g2, whereby a nut serves as a stop. The carriage d carries at its lower end a bowl z and is provided with grooves Z3 in which a pawl z', rotatably disposed on the carriage guide c, engages with its tooth l and is kept in mesh by a spring 2. For introducing compressed air into the tube g serves an air-tube icl, connecting the boring of the nut g8 with a of the journal b, which is, on its part, connected by a cross-boring b2 to a ring a2, recessed in the bearing a1 and by means of this ring to an air-tube k2. In order to lead through the air-tube b1, c, the carriage aZ is provided with recesses d4., d5.

For actuating the journal serve a pulley Z, fixed on a shaftlsupported in three bearing a8, a* and a5, and two pairs of bevel wheels m1, m2 and m3,'m4. While the bevel wheel m1 is fixed on the shaft Zl and the bevel wheel m2 and m8 on a shaft Z2 guided perpendicular to the shaft Z1 in two bearings a and a?, the bevel wheel 'm4 to the journal b. The shaft Z1 simultaneously transmits its motion by means of a pair of bevel wheels m, m to a second shaft Z3, guided perpendicular thereto in two bearings aS and a9, and the shaft Z3 again by means of a bevel wheel m7 to a bevel wheel m8 which is rotatable in a bearing n. The latter is fixed on a table-top al", carrying two guide-bars au between which a carriage o is displaceable from a hand wheel p by means of a toothed wheel g1, supported in the carriage o and a rack g2 provided on the table-top a1o in the axial direction of a shaft 9' provided with a key r1. The shaft?l which is.. supported in a bearing o1 on the carriage o and provided with a spur wheel s1, is actuated from the bevel Wheel m8. It serves for actuating a tension sleeve t which is rotatable in a bearing vo2 and provided with a spur wheel s2 as well as a stud-bow t1. The ratio of gearing of all coacting pairs of toothed wheels is 1:1.

Fig. 1 of the drawing shows by dash lines a pear-shaped glass body u onto which an extension tube o is fused at a certain dei'inite angle. In order to carry out with the device the fusing together of such work pieces it is necessary to put the glass body u provided with an insuiflating aperture u1 between the bowl 71, and the conical hood g1 as well as the prepared tube v by means of the stud-bow Z1 into the tension sleeve t. The glass body u is thereby so adjusted by means of the locking mechanism, formed by the pawl z' and the grooves d", that a generating longitudinal boring b1 is connected off rss-resi line of its surface sects the axis of rotation of the device in the fusing place, thus, e. g. by the insertion of the tooth l into the groove farthest on the right-hand side.

The device having been actuated from the pulley Z, it is necessary to heat the fusing place (for instance by means of gas blowpipes, manually operated and not sh'own in the drawing) until b blowing air into the air-tube k2 it is possible to obtain an elevation of the surface, the wall of which will burst onf the blowing-in of air bein continued.. The aperture thus obtaine -hav- 1n been properly enlarged, the extension tue rv, while bein continually heated, is brought near the Eising place by dis lacing the carriage o with the aid of the hand wheel p. As soon as the in contact with one another, they adhere to each other. Thereupon, while the fusing place is further continually heated, the carriage d in the ide c is brought into the position, prescri ed for the extension tube o, in which the tooth 1 engages in another groove di. Finally, after the hardening of the fusing place end of the tube fv, .exceeding a prescribed length,'may be fused We claim:

1. A device for fusing glass extensions onto glass vessels, glass tubes and the like, containing a base plate, a guide rotatably supported on this base plate, and a gripping device fixed on this ide in such a Way as to be displaceable re atively to it in a plane conaining the axis of rotation of the sai u1 e. g 2. A device according to claim l, containing a locking mechanism adapted to x the gripping device on the guide in different positions.

3. A device for fusing glass extensions onto glass vessels, glass tubes and the like, containing a base plate, a gripping device rotatably supported on this base plate, this gripping device being adapted to receive the vessel to be worked in such a way that its longitudinal axis intersects the axis of rotation of the said gripping device, and a second gripping device supported on the base plate rotatable about the same axis as the first gripping device and adapted to receive the extension to be fused on, at least one of the said two gripping devices being displaceable relatively to the base plate in the direction of the said axis of rotation.

4. A device for fusing glass extensions onto glass Vessels, glass tubes and the like, containing a base plate, a gripping device rotatably supported on this base plate, this gripping device being adapted to receive the vessel to be worked in such a way ,that its longitudinal axis intersects the axis of rotaaa, being the perpendicularly inter- G5 bodies u and c' are tion of the said gripping device, a second gripping device sup-ported on the base plate rotatable about the same axis as the rst gripping device and adapted to receive the extension to be fused on, at least one of the said two gripping devices being displaceable relatively to the base plate in the direction 

